The best type of free birdhouse plans to choose are those that incorporate a hinged front to the house, which means you can open the house to view the birds development without distressing the nesting mother or baby chicks inside.
Most wooden bird house plans advise that certain types of wood, such as cedar, are more suitable than others. Cedar for example, is an excellent choice for a bird house as it naturally repels insects.
While choosing a bird house building plan you need to take into account whether the area you plan to place your bird house in is already conducive to attracting birds.